Overview

Some hosting providers dynamically update their customer's IP addresses. These customers must then update the new origin server IPs in their Cloudflare DNS. Below are several methods for automatically updating dynamic IPs in Cloudflare DNS.

Cloudflare API

Cloudflare DNS can be updated via the Cloudflare API. For example, a Cloudflare customer can create a script to monitor for IP address changes and then have the script push those changes to the Cloudflare API.

DNS-O-Matic

DNS-O-Matic is a third-party tool that provides a way to announce dynamic IP changes to multiple services. DNS-O-Matic allows a user to pick and choose what Dynamic DNS services to notify about the update and is configurable from a UI. Refer to the documentation for DNS-O-Matic.

Address questions or feedback to the email address for OpenDNS staff provided in the aforementioned documentation.

Configuration of DNS-O-Matic requires prior knowledge of the following information. Content within <> brackets below must be determined for the particular domain:

Email:<CLOUDFLARE ACCOUNT EMAIL ADDRESS>

API Token:<CLOUDFLARE GLOBAL API KEY>

Domain:<example.com>

Hostname:dynamic

Email is the email address corresponding to the account used to log in to Cloudflare. If using Cloudflare’s Multi-user account feature, this email address must have sufficient privileges for managing DNS.